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The two types of input in digital
photography are analog and
digital. For analog input, one uses
a traditional film camera to shoot a
subject. After the subject has been
captured on film, one converts the
negative, or print, into digital
data using a film or a flatbed
scanner. Following this, one
transfers the data to a computer.
For digital input, one uses a
digital camera to shoot the subject
and then transfers the digital data
to a computer either directly, or
via a memory card.
The computer serves as a processing
device in which both analog and
digital data can be manipulated
using computer software. The result
is that the final image may be very
different from the original one
captured on film, or by a digital
camera.
There are a number of choices for
output devices. One can use a film
recorder to make color slides or
film negatives, or a printer to make
prints; one can simply store images
in disks, or share them over the
internet.
The following flow chart illustrates
the steps through which information
passes from input to output, using
either digital or analog input. We
call it “the digital photography
trail”:
A
digital camera works exactly like a
film-based camera, the main
difference being that it does not
use film. The digital trail shows
the advantage and convenience of
using a digital camera to capture
images. Using a digital camera will
allow you to move directly from
camera to computer via a memory
card, without having to bother with
prints or scanning.
One feature of digital cameras that
has won the heart of many
photographers is that they give you
instant playback of images. This
means that you can make sure you’ve
got the picture you want before you
leave the scene.
Digital cameras provide you with a
powerful and enjoyable method of
communication. The next four
articles will help you choose an
appropriate digital camera for your
needs. |
